OpenAIGPT-5.1Arena #23Dec 1, 2025
GPT 5.1 Chat
GPT-5.1 Chat points to the GPT-5.1 snapshot currently used in ChatGPT. We recommend GPT-5.1 for most API usage, but feel free to use this GPT-5.1 Chat model to test our latest improvements for chat use cases.
Context Window
128K
tokens
Max Output
16K
tokens
Released
—
Arena Rank
#23
of 305 models
Capabilities
👁Vision
🧠Reasoning
🔧Tool Calling
⚡Prompt Caching
🖥Computer Use
🎨Image Generation
Pricing Comparison
| Router | Input / 1M | Output / 1M | Cached Input / 1M |
|---|---|---|---|
| Requesty★ | $1.25 | $10.00 | $0.13 |
| Martian | $1.25 | $10.00 | $0.13 |
Model IDs
Requesty
openai/gpt-5.1-chatTags
visionreasoningtool-callingcaching
Available Regions
EUUS